package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);
        //清理所有菜品缓存数据
//Set keys = redisTemplate.keys("dish_*");
//redisTemplate.delete(keys);

//清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_"+dishDto.getStatus();
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器
    Page<Dish> dishPage=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>();
        LambdaQueryWrapper<Dish> lqw=new LambdaQueryWrapper<>();

        lqw.like(StringUtils.isNotEmpty(name),Dish::getName,name);

        lqw.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        dishService.page(dishPage, lqw);

        BeanUtils.copyProperties(dishPage,dishDtoPage,"records");

        List<Dish> records = dishPage.getRecords();
        List<DishDto> recordList= records.stream().map((item)->{
            DishDto dto=new DishDto();
            BeanUtils.copyProperties(item,dto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dto.setCategoryName(categoryName);
            }
            return dto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(recordList);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }
    /**
     * 修改菜品和口味信息
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        //清理所有菜品缓存数据
//Set keys = redisTemplate.keys("dish_*");
//redisTemplate.delete(keys);

//清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_"+dishDto.getStatus();
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 修改菜品状态
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public  R<String> status(@PathVariable int status,Long ids){
        Dish dish = dishService.getById(ids);
        LambdaQueryWrapper<Dish> lqw=new LambdaQueryWrapper<>();
        lqw.eq(Dish::getId,ids);
        dish.setStatus(status);
        dishService.updateById(dish);
        return R.success("修改菜品状态成功");
    }

    /**
     * 删除菜品信息和口味
     * @param ids
     * @return
     */
    @DeleteMapping
    public  R<String> delete(Long ids){
        dishService.removeWithFlavor(ids);
        return  R.success("菜品删除成功");

    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList=null;
    //动态构造Key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();
    //先从redis中获取缓存数据
        dishDtoList= (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList!=null){
            //如果存在，则直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        //构造查询条件
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加条件，查询状态为1的（起售状态）
        lambdaQueryWrapper.eq(Dish::getStatus, 1);
        lambdaQueryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //条件排序条件
        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(lambdaQueryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            //根据id查分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL: select* from dishflavor where dish_id=?;
            List<DishFlavor> dishFlavorlist = dishFlavorService.list(queryWrapper);
            dishDto.setFlavors(dishFlavorlist);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，则查询数据库，并且将查询到的菜品数据添加到缓存中
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


}
